箭载测控系统高速数据采集传输电路的设计

Aiming at the characteristics of the high-accuracy requirements, the variety of signals, and the large amount of data of the arrow-borne test sensors of the new generation of launch vehicles, a high-speed acquisition and transmission circuit was designed based on the GTX high-speed interface. The FPGA controlled the A/D converter with high-sampling rate and serial port to separately collect analog signals and digital signals, and then the FPGA performed a series of internal pre-processing such as framing and identifying control code on the collected analog and discernible signals and transferred them to the inside of the GTX high-speed interface. After that, through 8/10 decoder conversion, staticizer, circuit equalizer and other modules, data were in serial transmission in differential form. The system can collect data stably for a long time, which can realize the high speed transmission of 3.6 Gbit/s.